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g. All ponds except Pond 018 will have a keyway cut along the entire width of the <br />dam. This keyway will be filled with competent material and compacted to the <br />same standards as the dam foundation. <br />h. All principal spillways will have 2 anti -seep collars installed within the dam <br />which will be at least 2x the pipe diameter. All dam fill will be compacted around <br />the anti -seep collars and principal spillway pipe to 90% of the maximum dry <br />density of the fill material. <br />i. Attachment 2.05.3(3)-15 demonstrates that the given materials on site have been <br />tested for suitability in constructing pond embankments and that the long term <br />slope safety factors exceed 1.3 in all cases, given the pond design parameters <br />outlined above and in the Attachment. For this reason, no individual slope <br />stability analyses are presented for the ponds. The exception to this being Ponds <br />016 and 018 for which individual slope stability analyses have been provided. <br />Pit dewatering may occur year round or during portions of a year. The dewatering process will <br />be a sporadic operation controlled occurrence depending on various factors which may include <br />the location of the pit inflows, the location of standing water in the pit, or the location within the <br />pit of the overburden and coal removal operations. When pit dewatering is required, the <br />anticipated dewatering rate will be in the range of one to two cubic feet per second or less. Mine <br />pit dewatering was transferred from Pond 011 to Pond 013 in June 2011. <br />Ponds 009, 012, 013, 015, 016, and 018 will be maintained until: <br />1. The disturbed areas are reclaimed and the vegetation success requirements of Section <br />2.05.4(2)(e), revegetation are met. <br />2. The untreated drainage from the disturbed area ceases to contribute additional suspended <br />solids above natural conditions, and <br />3. The drainage leaving the pond meets applicable State and Federal water quality <br />requirements, if any, for the receiving streams. The ponds will be removed when the <br />appropriate sections of the regulations are satisfied. <br />When the ponds are removed, the affected land will be regraded and revegetated pursuant to the <br />DRMS's regulations, Section 4.05.17 and the approved New Horizon Reclamation Plan. <br />Pond 008 was constructed in an area which contained three small stock ponds on the Burbridge <br />property. The landowner has provided a letter stating that he would like Pond 008 to remain to <br />Section 2.05.3(3) Page 13 April 2017 (MR -104) <br />